The BGLComp SDK refers to a Terrain SDK, but I have not been able to locate it anywhere. Does it exist yet? My goal is to improve the accuracy of the roads, etc. in my local area (south-central Michigan). In the meantime, I've been having fun with the free-ware utilities here, and the payware software from Abacus. BTW: I, too am a complete "newbie" , having just crossed over to the dark side from my Mac

Thank-you! I have downloaded and begun looking at it, but it is designed for FS2002. The BGL compiler is different for FS2004. I haven't been able to find the old BGLC.exe download on M$'s site yet.